Frequencies for first 10,000 rows of cf3 variable in accident dataset :

   Accident |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,632       96.32       96.32
          1 |          1        0.01       96.33
          3 |          1        0.01       96.34
          5 |          1        0.01       96.35
         26 |          1        0.01       96.36
         99 |        364        3.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016